As Xi'an Jiaotong-Liverpool University researchers completed their research on colored architectural concrete, they found a surprising result—green pigmented cement had impurities that produced porous, poor quality concrete. ...
Materials Science
Jul 23, 2021
0
12
New technologies that capture and recycle carbon dioxide from industrial processes such as steel and cement making will be vital if the EU is to meet its goal of slashing greenhouse gas emissions by at least 55% by 2030 and ...
Environment
Jun 15, 2021
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2
The consumption of raw materials has increased notably in industry in general, and in the construction industry in particular, amidst growing concerns over sustainability issues. Concrete and mortar are the most commonly ...
Materials Science
Jun 10, 2021
1
9
The concrete world that surrounds us owes its shape and durability to chemical reactions that start when ordinary Portland cement is mixed with water. Now, MIT scientists have demonstrated a way to watch these reactions under ...
Materials Science
Jun 07, 2021
0
23
Researchers have found the right formula for mixing a cement that does double duty as a structural material and a passive photocatalytic water purifier with a built-in means of replenishment: simply sand down the material's ...
Materials Science
May 04, 2021
0
10
Since its invention several millennia ago, concrete has become instrumental to the advancement of civilization, finding use in countless construction applications—from bridges to buildings. And yet, despite centuries of ...
Nanophysics
Apr 21, 2021
3
396
Researchers at the Institute of Industrial Science, a part of The University of Tokyo, have developed a new method of producing concrete without cement. They have directly bonded sand particles via a simple reaction in alcohol ...
Materials Science
Apr 14, 2021
0
7
Ube Industries, Ltd., the Port and Airport Research Institute, Japan Agency for Marine-Earth Science and Technology (JAMSTEC), Tokyo Institute of Technology, and Tokyo University of Marine Science and Technology today announced ...
Materials Science
Apr 09, 2021
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4
This could be where the rubber truly hits the road.
Nanomaterials
Mar 29, 2021
1
966
Ph.D. researcher Olawale Oloye and Professor Anthony O'Mullane from the QUT Centre for Clean Energy Technologies and Practices developed the electrochemical capture and conversion of carbon dioxide process which also generates ...
Biochemistry
Mar 25, 2021
1
63
In the most general sense of the word, a cement is a binder, a substance which sets and hardens independently, and can bind other materials together. The word "cement" traces to the Romans, who used the term "opus caementicium" to describe masonry which resembled concrete and was made from crushed rock with burnt lime as binder. The volcanic ash and pulverized brick additives which were added to the burnt lime to obtain a hydraulic binder were later referred to as cementum, cimentum, cäment and cement. Cements used in construction are characterized as hydraulic or non-hydraulic.
The most important use of cement is the production of mortar and concrete - the bonding of natural or artificial aggregates to form a strong building material which is durable in the face of normal environmental effects.
Cement should not be confused with concrete because the term cement explicitly refers to the dry powder substance. Upon the addition of water and/or additives the cement mixture is referred to as concrete, especially if aggregates have been added.
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